Re: HAPI and FHIR RDF R5?

Hi Detlef,

The RDF serialization used in the official FHIR spec is implemented here:
https://github.com/hapifhir/org.hl7.fhir.core
Here are direct links to the most relevant files and where they're used:
https://github.com/w3c/hcls-fhir-rdf?tab=readme-ov-file#rdf--shex-generation

R4 example patient: https://hl7.org/fhir/R4/patient-example.ttl.html
R5 example patient: https://hl7.org/fhir/R5/patient-example.ttl.html

HAPI is one implementation that may need to be updated and should probably
use some of the updated code from org.hl7.fhir.core.
https://github.com/w3c/hcls-fhir-rdf/issues?q=hapi

Best,
Tim

On Fri, Jul 11, 2025 at 5:57 PM Detlef Grittner <detlef.grittner@cureator.de>
wrote:

> Hello Eric,
>
> after we had the discussion about a potential conversion from FHIR RDF R4
> to R5, I had a look at the latest release of HAPI/FHIR.
>
> Now I'm a bit puzzled, because even though I've chosen an R5 context the
> output of the RDFParser looks like R4.
> For example it has predicates like fhir:Patient.identifier instead of
> fhir:identifier.
>
> Looking at the source code on github
> <https://github.com/hapifhir/hapi-fhir>, I couldn't find any test
> related to FHIR/RDF and R5 either.
> I think this is the currently used RDFParser:
> https://github.com/hapifhir/hapi-fhir/blob/master/hapi-fhir-base/src/main/java/ca/uhn/fhir/parser/RDFParser.java
> I had a short glance at the constructPredicateName method and it
> looks like as if it produces R4 style predicates.
>
> Is there even an implementation for HL7/FHIR R5 RDF?
>
> Best Regards,
> Detlef
>
>
>
> Detlef Grittner MSc, M.A.
> CTO
>
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-- 
Tim Prudhomme